公开(公告)号：DE69216756T2

公开(公告)日：1997-05-28

申请号：DE69216756

申请日：1992-10-29

Applicant: DAICEL CHEM

Inventor： KIYOSE ATSUNOBU ,  KATO YONOSUKE

IPC: C08B11/193 ,  C08B11/20

Abstract: A process for producing a mixed cellulose ether comprising reacting a starting cellulose ether with an etherifying agent is disclosed, wherein said starting cellulose ether comprises at least 18 mol% of a 6-substituted glucose unit and at least 15 mol% of an unsubstituted glucose unit. A high utilization of the etherfifying agent can be reached. The resulting mixed cellulose ether has a high solubility in water and an aqueous solution of the resulting mixed cellulose ether has excellent properties such as flow properties and clarity.

公开(公告)号：DE69333157D1

公开(公告)日：2003-09-25

申请号：DE69333157

申请日：1993-11-11

Applicant: DAICEL CHEM

Inventor： ITOH MASANORI ,  KIYOSE ATSUNOBU ,  HIRAO KATSUMI

IPC: A24D3/10 ,  C08L1/10 ,  C08L1/12 ,  C08L67/00

Abstract: A cellulose ester composition is described which comprises (i) a cellulose ester having (a) an average degree of substitution not exceeding 2.15 and (b) an average polymerization degree of 50 to 250, and (c) having a 4-week decomposition rate of not less than 60 % by weight as determined using the amount of evolved carbon dioxide as an indicator in accordance with ASTM D 5209, or (ii) a cellulose ester having characteristics (a) and (b), and (d) having an equivalent ratio of residual alkali metal or alkaline earth metal to residual sulphuric acid in said cellulose ester of 0.1 to 1.1. The biodegradable cellulose ester composition is suitable for the manufacture of various articles including fibrous articles such as tobacco filters.

公开(公告)号：DE69216756D1

公开(公告)日：1997-02-27

申请号：DE69216756

申请日：1992-10-29

Applicant: DAICEL CHEM

Inventor： KIYOSE ATSUNOBU ,  KATO YONOSUKE

IPC: C08B11/193 ,  C08B11/20

Abstract: A process for producing a mixed cellulose ether comprising reacting a starting cellulose ether with an etherifying agent is disclosed, wherein said starting cellulose ether comprises at least 18 mol% of a 6-substituted glucose unit and at least 15 mol% of an unsubstituted glucose unit. A high utilization of the etherfifying agent can be reached. The resulting mixed cellulose ether has a high solubility in water and an aqueous solution of the resulting mixed cellulose ether has excellent properties such as flow properties and clarity.

公开(公告)号：DE69333157T2

公开(公告)日：2004-06-09

申请号：DE69333157

申请日：1993-11-11

Applicant: DAICEL CHEM

Inventor： ITOH MASANORI ,  KIYOSE ATSUNOBU ,  HIRAO KATSUMI

IPC: A24D3/10 ,  C08L1/10 ,  C08L1/12 ,  C08L67/00

Abstract: A cellulose ester composition is described which comprises (i) a cellulose ester having (a) an average degree of substitution not exceeding 2.15 and (b) an average polymerization degree of 50 to 250, and (c) having a 4-week decomposition rate of not less than 60 % by weight as determined using the amount of evolved carbon dioxide as an indicator in accordance with ASTM D 5209, or (ii) a cellulose ester having characteristics (a) and (b), and (d) having an equivalent ratio of residual alkali metal or alkaline earth metal to residual sulphuric acid in said cellulose ester of 0.1 to 1.1. The biodegradable cellulose ester composition is suitable for the manufacture of various articles including fibrous articles such as tobacco filters.

公开(公告)号：DE69630089D1

公开(公告)日：2003-10-30

申请号：DE69630089

申请日：1996-03-29

Applicant: DAICEL CHEM

Inventor： MURAKAMI KO ,  OKANO TOSHINORI ,  TANIGUCHI HIROKI ,  KIYOSE ATSUNOBU ,  SHIMAMOTO SHU

IPC: C08B3/06 ,  C08B3/22 ,  C08L1/12

Abstract: Cellulose acetate of high moldability with low solution viscosity in spite of high average degree of polymerization is obtained. Low molecular weight components of cellulose acetate (e.g., CTA having average degree of acetylation of 59.0 to 62.5 %) are eluted with a washing solvent to produce cellulose acetate having molecular weight distribution Mw/Mn of 1 to 1.7. As washing solvent, those swell or partially dissolve cellulose acetate, for example, those dissolve 0.1 to 30 % by weight of cellulose acetate can be used. Such solvent includes, for example, a solvent having solubility parameter delta of 7 to 12.5 (ketones, ethers, organic acid, esters, etc.).

公开(公告)号：DE69626254T2

公开(公告)日：2003-07-24

申请号：DE69626254

申请日：1996-03-29

Applicant: DAICEL CHEM

Inventor： KIYOSE ATSUNOBU ,  SHIMAMOTO SHU ,  SHUTO YUICHIRO ,  TANIGUCHI HIROKI

IPC: C08B3/06

公开(公告)号：DE69626254D1

公开(公告)日：2003-03-27

申请号：DE69626254

申请日：1996-03-29

Applicant: DAICEL CHEM

Inventor： KIYOSE ATSUNOBU ,  SHIMAMOTO SHU ,  SHUTO YUICHIRO ,  TANIGUCHI HIROKI

IPC: C08B3/06

公开(公告)号：CA2102927A1

公开(公告)日：1994-05-14

申请号：CA2102927

申请日：1993-11-12

Applicant: DAICEL CHEM

Inventor： ITOH MASANORI ,  KIYOSE ATSUNOBU ,  HIRAO KATSUMI

IPC: A24D3/10 ,  C08L1/10 ,  C08L1/12 ,  C08L67/00 ,  C12N11/00 ,  C08B3/00 ,  C08B5/00

Abstract: A cellulose ester composition is described which comprises (i) a cellulose ester having (a) an average degree of substitution not exceeding 2.15 and (b) an average polymerization degree of 50 to 250, and (c) having a 4-week decomposition rate of not less than 60 % by weight as determined using the amount of evolved carbon dioxide as an indicator in accordance with ASTM D 5209, or (ii) a cellulose ester having characteristics (a) and (b), and (d) having an equivalent ratio of residual alkali metal or alkaline earth metal to residual sulphuric acid in said cellulose ester of 0.1 to 1.1. The biodegradable cellulose ester composition is suitable for the manufacture of various articles including fibrous articles such as tobacco filters.

公开(公告)号：DE69630089T2

公开(公告)日：2004-04-01

申请号：DE69630089

申请日：1996-03-29

Applicant: DAICEL CHEM

Inventor： MURAKAMI KO ,  OKANO TOSHINORI ,  TANIGUCHI HIROKI ,  KIYOSE ATSUNOBU ,  SHIMAMOTO SHU

IPC: C08B3/06 ,  C08B3/22 ,  C08L1/12

Abstract: Cellulose acetate of high moldability with low solution viscosity in spite of high average degree of polymerization is obtained. Low molecular weight components of cellulose acetate (e.g., CTA having average degree of acetylation of 59.0 to 62.5 %) are eluted with a washing solvent to produce cellulose acetate having molecular weight distribution Mw/Mn of 1 to 1.7. As washing solvent, those swell or partially dissolve cellulose acetate, for example, those dissolve 0.1 to 30 % by weight of cellulose acetate can be used. Such solvent includes, for example, a solvent having solubility parameter delta of 7 to 12.5 (ketones, ethers, organic acid, esters, etc.).

公开(公告)号：DE69316836T2

公开(公告)日：1998-06-18

申请号：DE69316836

申请日：1993-11-11

Applicant: DAICEL CHEM

Inventor： ITOH MASANORI ,  KIYOSE ATSUNOBU ,  HIRAO KATSUMI

IPC: A24D3/10 ,  C08L1/10 ,  C08L1/12 ,  C08L67/00

Abstract: A cellulose ester composition is described which comprises (i) a cellulose ester having (a) an average degree of substitution not exceeding 2.15 and (b) an average polymerization degree of 50 to 250, and (c) having a 4-week decomposition rate of not less than 60 % by weight as determined using the amount of evolved carbon dioxide as an indicator in accordance with ASTM D 5209, or (ii) a cellulose ester having characteristics (a) and (b), and (d) having an equivalent ratio of residual alkali metal or alkaline earth metal to residual sulphuric acid in said cellulose ester of 0.1 to 1.1. The biodegradable cellulose ester composition is suitable for the manufacture of various articles including fibrous articles such as tobacco filters.